Emerge Yul recompiler (#1)

Provide a modified (and incomplete) version of ZKSync zksolc that can compile the most basic contracts

crates/integration/contracts/Computation.sol

@@ -0,0 +1,19 @@
+contract Computation {
+    function triangle_number(int64 n) public pure returns (int64 sum) {
+        unchecked {
+            for (int64 x = 1; x <= n; x++) {
+                sum += x;
+            }
+        }
+    }
+
+    function odd_product(int32 n) public pure returns (int64) {
+        unchecked {
+            int64 prod = 1;
+            for (int32 x = 1; x <= n; x++) {
+                prod *= 2 * int64(x) - 1;
+            }
+            return prod;
+        }
+    }
+}